Ultra-broadband, Fabrication-tolerant 3-dB Power Splitter Based on Dual-layer SOI Platform

A 3-dB adiabatic directional coupler based on dual-layer SOI is innovatively proposed. Our proposed device offers an ultra-broadband of 300 nm and compact footprint of 65 μm, with a 0.19 dB loss. With its comprehensive performance, it can be used in large-scale photonic integrated circuits.